Rainwater lists maker as "John T. Vansant & Bro", "Vansant & Co in 1850", sold out by sheriff 1886, "John T Vansant Mfg Co 1887-1905"
No marks are shown in Rainwater.
As shown in image the mark is John T Vansant & Co. along with a 3 part makers logo. All pieces are also marked Sterling [not shown]
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Found with this set was several similar pieces dated 1876 thru 1881